How is human intelligence measured?

IQ refers to the quotient of intelligence test, that is, divide your intellectual age by your actual age and multiply it by 100. Generally speaking, it is normal to have an IQ between 80- 120, and abnormal to have an IQ above 120.

The IQ test includes 1 1 items, including common sense, understanding, arithmetic, similarity, memory, words, images, building blocks, permutation, puzzles and symbols. It takes about an hour to complete the whole test.

IQ test, also known as IQ test, was put forward by German psychologist L.W.Stern. IQ is a quantitative index of a person's intelligence level, but it can also be expressed as a person's mastery of knowledge, reflecting his observation, memory, thinking, imagination, creativity and ability to analyze and solve problems.

Influencing factors of IQ value:

First, heredity:

It is found that IQ-related genes have different frequency distributions in different races, and races with high average IQ have more IQ genes than races with low average IQ. Generally speaking, if parents have high IQ, their children's IQ will not be low.

This genetic factor is also manifested in blood relationship. Parents are local, and the average IQ of children is 102. The IQ of children born of parents married in different provinces is109; Parents are cousins, and the number of children with low IQ has increased significantly.

Second, breast milk:

Breast milk contains a variety of active substances that promote children's intellectual development, especially taurine, which has an important influence on intellectual development, which is 10 times higher than milk. According to the survey, the IQ of children who grow up with breast milk is about 3~ 10 higher than that of children who grow up with milk substitutes.

Third, diet:

Monotonous diet leads to the lack of some trace elements, or too little diet, protein and other serious nutritional deficiencies, which will lead to IQ retardation. Excessive intake of heavy metals such as lead and copper will also affect IQ.

Fourth, weight:

Children who weigh more than 20% of normal children will have low vision, hearing and ability to accept knowledge. This is because too much fat in obese children enters the brain, which will hinder the development of nerve cells and the proliferation of nerve fibers.